小波域分存和软判决恢复的隐藏技术  

A Visual Cryptography Technology based on Wavelet Domain Embedding and Soft Decision Recovering Method

作　　者：廖燕芳[1] 艾斯卡尔.艾木都拉[1] 

机构地区：[1]新疆大学信息科学与工程学院,新疆乌鲁木齐830046

出　　处：《通信技术》2011年第3期83-85,共3页Communications Technology

摘　　要：研究了一种把小波变换和可视密码技术相结合的信息隐藏方案,实现对灰度图像的信息隐藏。该方案把经过Arnold变换处理后的秘密信息,按照k阶线性方程求解理论产生n幅分享图片,再把n幅分享图片应用离散小波变换信息隐藏理论,分存到n幅公开图片中。提取秘密图片时,必须要大于k幅公开图片才能获得秘密图片。实验结果表明,该方案具有很强的鲁棒性,而且秘密信息不容易丢失。To achieve the copyright protection of digital image,this paper proposes a method based on integration of visual cryptography and wavelet transform.Five pictures are chosen to hide the secret and the secret information by visual cryptography method.First,the secret information is encoded into nshared images by linear equations after Arnold transform,then n carrier images for hiding secret information are chosed,and the shared images are embedded respectively in the low frequency coefficients of each carrier image.Thus k or more shares are required to recover the carrier image,while k-1 or fewer of them could gain no information of the carrier image.This algorithm shows high robustness and high safety.

关 键 词：可视密码 信息隐藏 DWT变换 软判决 ARNOLD置乱 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]